Domain backorder is a service offered by ICANN-certified providers and it's the easiest way to get a good domain that was owned by a third party and was left to expire. When the registration period of a site has expired, the aforementioned becomes inactive, but is not deleted instantly. Instead, the owner has a couple of months to renew it. If this doesn't happen, the domain name enters a deletion period which continues about 5 days and subsequently it gets deleted, so anybody will be able to register it. The backorder service will help you to make an order for such a domain name with a registrar company and they'll try to register it immediately as soon as it's on the market. That way, you will be able to get a brief and appealing domain for your website and although such domains are registered on a first -come, first-serve basis and there isn't any warranty that you will acquire the desired domain, using a computerized system gives you a much better chance than if you keep checking if the domain is deleted and attempt to acquire it yourself.